Onslaught FastCap Spider and Scorpion Insecticide

$56.50 - $397.71

Free Shipping!  Free Shipping!

Not for Sale to: CT

4.5 out of 5 stars Rating: 4.7

74 Reviews | 58 Q&A

 Compare

{ $56.50 { $55.78 $397.71 $381.72
  Size/Description Price/Ea. Qty
Onslaught FastCap Spider and Scorpion Insecticide pint (16 oz)

Buy 1: $56.50 each

Buy 2 or more: $55.78 each

$56.50
Onslaught FastCap Spider and Scorpion Insecticide - Gallon gallon (128 oz)

Buy 1: $397.71 each

Buy 2 or more: $381.72 each

$397.71
Total Price: $0.00


Availability: Normally ships in 1 business day.
For large order quotes, please call us at 1-866-581-7378.

Onslaught FastCap Spider and Scorpion Insecticide

Onslaught FastCap Spider and Scorpion Insecticide is an economic and easy to use formula that provides quick knockdown and long lived residual control of scorpions, spiders, and other insects listed on the label. This one of a kind formulation is made of Exponent brand synergist, Esfenvalerate, and Prallethrin. Onslaught FastCap Spider and Scorpion Insecticide can be applied in a number of areas both indoor and outdoor, as well as food areas (see label for complete list). This product is labeled for use as an indoor broadcast treatment.




Onslaught FastCap Spider & Scorpion Insecticide combines fast kill (action) and long residual activity against pests listed on this label when applied as surface or spot treatments, injected into wall voids, or as a crack and crevice spray in and around residential and commercial structures, as well as on turf and landscaping. Onslaught FastCap Spider & Scorpion Insecticide may be sprayed on any surface that will not be stained by water. DO NOT use this as a fogger or apply it as a space spray. Injector application equipment that delivers low volume treatments may be used to make crack and crevice injections or spot and general surface treatments.

Spiders, scorpions and other listed crawling insects Indoors:

Apply as a course, wet spray to surfaces where these pests are normally found. Treat floors, baseboards, around doors and windows, in attics, crawl spaces, eaves, corners, closets, walls, utility pipes, storage areas, and all cracks and crevices. Treat underneath sinks, dishwashers, refrigerators, stoves, the underside of shelves, drawers, cabinets, areas behind pipes, and in all places where these insects shelter. Contact as many insects as possible with direct spray. Repeat applications as needed, but do not exceed more than one (1) application every seven (7) days.

Mixing tip. Shake Onslaught FastCap bottle well prior to mixing. Clean spray equipment before using or diluting Onslaught FastCap. For dilution, add half the required water to spray tank, then add the appropriate amount of Onslaught FastCap. Agitate the mixture, and then slowly add the remainder of the water. Agitate the spray thoroughly before using and also occasionally during use to ensure dispersion. If you use a spray filter screen, they should be 50 mesh or larger.

Use Onslaught FastCap as part of an IPM program. Tank mix Onslaught FastCap with an IGR such as NyGuard IGR Concentrate to break the insect growth cycle and control future emerging insect populations. Do not apply Onslaught FastCap as a fog or space spray. Fog first with a product such as Riptide Water-Based Pyrethrin ULV to get the quick knockdown action of the fog followed by a surface application of Onslaught FastCap for residual control.

Rating Snapshot

5 stars   58
4 stars   11
3 stars   2
2 stars   2
1 star   1

See all 74 reviews »

Best of
the Best

Average Customer Rating
4.5 out of 5 stars (74)

Write a Review

Sort By: 

  

Most Helpful Customer Reviews
  • 30 of 30 people found this review helpful:

    5 of 5 stars  Initial review on effectiveness vs scorpions
    By Scott in Chandler Az on 03/02/2014
    Verified Purchase

    Main Target Pest- Bark Scorpion I have used Cykick, Cyper WP, Bifen IT, Demand, and suspend polyzone for scorpion control here in AZ. Cyckick seems to be the best so far. I don't have a huge problem with them, but I have found the occasional one indoors. I black light ~ every night once the temp is warm enough at night to monitor activity. I spray onslaught for the first time in mid feb. I went out 1 week later and found a dead one against the cinder block wall. I don't normally see this even with Cykick, so I got lucky or this stuff works well. It is also cheaper than Cykick per finished gallon once the price drop to _ 60/ bottle. I will use until gone and see how well it control scorpions this summer.

    Was this review helpful to you?  Yes No

  • 21 of 22 people found this review helpful:

    5 of 5 stars  FAST CAP ROCKS!
    By Wanda in Orlando, FL on 05/23/2013

    I live in an area where pests are common, this product controls them all. Bed bugs, fleas, ants, roaches, wasps, spiders scorpions... I had zero problems since I started using it. This product also lasts a long time, its around much longer than other products I have tried in the past.

    Was this review helpful to you?  Yes No

  • 21 of 21 people found this review helpful:

    5 of 5 stars  Works Great!!!! If you have scorpions get it!
    By Dana in Cumming, GA on 09/23/2013
    Verified Purchase

    I would really recommend this product. I got it for spiders & scorpions both inside & outside the house. I've only used inside so far but it works. I don't know if this stuff calls out the scorpions but 3 are dead so far. I didn't even know i had that many scorpions around. I live in a new development in a heavily wooded area so I expected critters, never scorpions though.

    Was this review helpful to you?  Yes No

  • 19 of 19 people found this review helpful:

    5 of 5 stars  EXCELLENT PRODUCT
    By Mike in Reliance, TN on 11/07/2014
    Verified Purchase

    We live in a National Forest surrounded by heavy forest. After years of paying $95+ per regular scheduled visits by a pest control company, we still had scorpions inside of our home. We knew something had to be done better than a local pest control service. After web searching, we came across this company and the product Onslaught. One application of Onslaught (2tbs) per gallon wiped out the scorpions & all other creeping critters! Best pest control product we have purchased. We cancelled our pest control service! We applied Onslaught on fire ants just to see what the results would be...killed them all dead within a few minutes! We highly recommend this product.

    Was this review helpful to you?  Yes No

  • 18 of 20 people found this review helpful:

    5 of 5 stars  Great poduct and service!!!
    By Darren in California on 11/16/2012
    Verified Purchase

    Your web site is user friendly and easy to navigate. The cost of your products are at or lower than others sites. I did find a sprayer on another site that was lower and I sent you the link. You then lowered the price and I purchased it along with insecticide. By the way, Onslaught Fastcap Spider Insecticide does what it says it will do!! Great product! Great company! I could'nt ask for a better outcome.

    Was this review helpful to you?  Yes No

Most Recent Customer Reviews
  • 5 of 5 stars  Ladybug and stink bugs
    By Michelle in Aliquippa, Pennsylvania was on 10/19/2017

    Wow! I was spraying the house and the ladybugs were dying/flying off. Love the product

    Was this review helpful to you?  Yes No

  • 5 of 5 stars  Great Product
    By Judy in Rexburg, Idaho on 10/10/2017

    We have found this to be very effective on our spiders, and cheaper than the stuff you can buy in the store!

    Was this review helpful to you?  Yes No

  • 5 of 5 stars  Scorpion killer!!
    By Roland in South Texas on 09/29/2017

    Due to hurricane harvey rainfall, my home was crawling with crickets which drew in the scorpions. Had local pest control company come in and retreat entire perimeter and still had scorpions crawling on foundation and porches. They told me to give it time to work and i told them that stuff they put out isn't even slowing down the crickets much less the scorpions. Sprayed Onslaught on porches and foundation and results were almost instant. Overnight there were numerous dead and dying scorpions and hundreds of dead crickets. These were the largest scorpions I've seen here, very healthy!! They were no match for Onslaught. Pest control company said to give it time to work but with scorpions, i want immediate results. The same night they sprayed their stuff, i saw scorpions running around on my porches. After spraying onslaught, the only scorpions I've seen are the good kind. Dead scorpions!!!!

    Was this review helpful to you?  Yes No

  • 1 of 1 people found this review helpful:

    4 of 5 stars  Great
    By Sinai in Albuquerque NM on 09/22/2017

    Absolutely love It!!!!! I do wish it could've been bigger for the price or a larger size before the $300 bottle. Gonna order again to have, just in case

    Was this review helpful to you?  Yes No

  • 5 of 5 stars  Great company and products
    By Ed in Colorado Springs, Colorado on 08/25/2017

    Company on phone helped me to figure out which product I needed. Best customer service around. The product they suggested worked liked they thought it would. Any questions and they are a phone call away. I give them 5 stars.

    Was this review helpful to you?  Yes No

  • 1 of 1 people found this review helpful:

    5 of 5 stars  This stuff kills everything !
    By Kendra in Georgia on 07/23/2017

    I love this stuff. I know it mainly treat scorpion spiders but this stuff will kill anything on contact. I bought it because I have a major problem with spiders. It's been 2 weeks later and I am still finding dead bugs all over the house and mainly in the basement. When I sprayed around the base of the house I found a bunch of dead " Black Widow Spiders", so know that it will kill other types of spiders. I would definitely buy this stuff again and I would recommend it, highly... Another great thing about this spray is the fact that it does not have a smell like most sprays, which I love ... I can spray and I don't have to deal with the strong unbearable smell.. Good stuff!

    Was this review helpful to you?  Yes No

  • 5 of 5 stars  Dead Spiders and Scorpions Everywhere!
    By Warren in Montgomery on 07/23/2017

    Not much else to say. This stuff works fantastic! Did not realize just how many bugs and insects I had. The back patio and garage has dead critters everywhere.

    Was this review helpful to you?  Yes No

  • 1 of 1 people found this review helpful:

    5 of 5 stars  This is the best
    By Barbara in Las VegasLas, Nevada on 07/18/2017

    Being new to a desert area, I had never seen a scorpion before. I tried many things, one worker pretty good, but u needed a product that worked perfectly. Our realtor made a YouTube video recommending this. I ordered it and sprayed the exterior of my house and edges around my yard, including all small cracks. That night I went out looking and found several-dead! Winner in my book.

    Was this review helpful to you?  Yes No

  • 1 of 1 people found this review helpful:

    4 of 5 stars  Better Than Others
    By Carol in Surprise, AZ on 07/18/2017

    We see way less scorpions than before I started using this product. I pay a company for monthly service, but was seeing just to many scorpions in my home. We had a different company come out and sealed our house. That took care of the scorpions getting in, but still saw them a lot of them outside. Started using this product and the number of scorpions outside has been reduced.

    Was this review helpful to you?  Yes No

  • 3 of 3 people found this review helpful:

    5 of 5 stars  Best I've used so far
    By Christopher in Tucson, Az on 07/09/2017

    Did the standard perimeter spray around outside of house. First time we have ever killed 100+ cockroaches overnight. Usually there's 10 or so the next morning. Nothing has recently changed in our yard to invite more bugs in. Verdict: works better, way better than anything I've used so far. FYI killing scorpions too and still killing after it has been down for 6 weeks.

    Was this review helpful to you?  Yes No

See all 74 reviews »

Have a question about this product?
Ask our product experts...

Ask a Question

Sort By: 

  

Most Helpful Q&A's

02/22/2015 Kagan from Las Vegas

QMixing Instructions
How much water do you mix to this product? Trying to decide if a bottle is enough to spray inside and outside of my house

AYou want to mix 1fl oz Onslaught FastCap Spider and Scorpion Insecticide into one gallon of water. One pint will give you approx. 16000 sq feet. 

25 of 26 people found this answer helpful.
Was this answer helpful to you?  Yes No

10/09/2013 Amy from Alexandria, Va

QIs Onslaught FastCap safe to use in homes with dogs?

AOnslaught FastCap is safe for pets when they enter the areas after the product has dried.

24 of 25 people found this answer helpful.
Was this answer helpful to you?  Yes No

05/19/2013 L. from Las Vegas, Nevada

QOnslaught versus Demand, Cykick or Cyzmic for Scorpions
To eliminate scorpions, is Onslaught the strongest, most effective insecticide to spray indoors and out? My treatments have included Demand, Cysmic and Cykick CS and Aerosol (aerosol for knockdown and cracks and crevices) and now am hearing about Onslaught FastCap Spider and Scorpion insecticide and wonder if it is stronger or the strongest. My thought is, if I'm spending money on insecticide and investing time to treat my home to ward off these horrible scorpions that I fear, I want the most effective product on the market. I'd rather purchase and concentrate on the best! Thanks.

AThe Onslaught FastCap would definitely be the best option for your needs. It is specifically formulated to better target spiders and scorpions with a more thorough and long lasting coverage for these hard to kill pests. Keep in mind, no matter what product you are using for scorpions, you have to create a wider barrier for them than any other pest around your home. For general insects you would treat with a barrier around the foundation 2 feet up and 2 feet out. With scorpions you should be doing 2-3 feet up and 6-10 feet out on the ground. Also make sure to treat any landscape areas around your home that they would be prone to hiding in ie: mulch, bark, landscape timbers, rocks etc. You can review more information for protecting your home from scorpions in our article on Scorpion Control.

19 of 20 people found this answer helpful.
Was this answer helpful to you?  Yes No

06/21/2013 Gary from South Point, Oh

QWhat's the best indoor spray for spiders?
Our church fellowship hall has an increasing amount of spiders and spider eggs. We are in a rural area of Ohio. They don't bother me that much...but a few female members are scared. What do you recommend? Please note we EAT in the fellowship hall.

AThe absolute best indoor/outdoor spider spray is Onslaught Fastcap. This one of a kind formulation is made of Exponent brand synergist, Esfenvalerate, and Prallethrin. Onslaught FastCap Spider and Scorpion Insecticide can be applied in a number of areas both indoor and outdoor, as well as food areas (see label for complete list).

12 of 13 people found this answer helpful.
Was this answer helpful to you?  Yes No

08/21/2014 Henry from Las Vegas Nevada

QWill respraying Onslaught FastCap Spider and Scorpion Insecticide be necessary after a moderate rainfall.

AThere is no need to respray Onslaught FastCap Spider and Scorpion Insecticide after a rain as long as the treated area was dried before the rain. There is a 60-90 day residual for Onslaught Fasttrac.

6 of 6 people found this answer helpful.
Was this answer helpful to you?  Yes No

Most Recent Customer Questions

03/26/2017 Scott from Lufkin, Tx

QWill Onslaught FastCap kill spiders and other insects? Is it a good option for general pest control?

A

Onslaught FastCap Spider and Scorpion Insecticide is an economic and easy to use formula that provides quick knockdown and long lived residual control of scorpions, spiders, and other insects listed on the label. You will mix 1 fl oz per gallon per 1,000 sq ft monthly to the exterior and quarterly to the interior cracks and crevices.

Was this answer helpful to you?  Yes No

01/02/2017 Brayan from Panama

QCan Onslaught FastCap be applied with a ULV fogger?

A

No, Onslaught FastCap cannot be used in any type of fogging equipment, only in conventional sprayers or mist blowers.

Was this answer helpful to you?  Yes No

12/22/2016 Josue from San Tan Valley

QCan you please clarify the mixing instructions on the Onslaught FastCap label?
I was wondering if you can explain why on the label it tells you to mix 7.93 ml per gallon of water, but then on the next column it says to use 40ml for 1 gallon?

A

The first column of the application rate instructions on the Onslaught FastCap label refers to the amount of water that is diluted into a gallon of water.† In this case, it is 1 oz or 7.93 mL.† The second column refers to the area over which that gallon of mixed solution should be distributed.† In this case, the second column is telling you that one gallon of mixed solution will cover 1000 square feet, which works out to be 40mL of mixed solution per square meter.†

Was this answer helpful to you?  Yes No

09/18/2016 Mike from Georgia

QHow much Onslaught do I mix into a 15 gallon Pull Behind Sprayer?
I have a house and a shed to treat. How much Onslaught to mix into a 15 gallon Pull Behind Sprayer? Sprayer is pulled by mower. I have a light to medium spider problem. How much to mix with 15 gallons of water?

A

The mixing ratio for Onslaught FastCap Spider and Scorpion Insecticide is 1 fl oz per gallon of water. You will use 15 fl oz in 15 gallons of water.

1 of 1 people found this answer helpful.
Was this answer helpful to you?  Yes No

09/09/2016 Brian from Gilbert, Az

QIs FastCap or Suspend SC better for controlling spiders, roaches and crickets outdoors?

A

Based on where you are located, the Onslaught FastCap would be a better choice for you. FastCap has additional active ingredients to allow for faster kill of target insects when first spraying, and it has encapsulated technology for better residual in heat and sunlight. We would recommend the newer Suspend Polyzone over Suspend SC.

1 of 1 people found this answer helpful.
Was this answer helpful to you?  Yes No

08/15/2016 Gelsomina from Saint Augustine, Fl

QCan I use Onslaught FastCap in a backpack fogger or just in a hand held pump sprayer?
Can it be applied to St. Augustine and Bahiagrass? Also, can it be used on Hibiscus, canna lillies, fruit trees, crate myrtle trees, all kinds of trees. I have a lot of flowers and plants. The main target is wolf spiders & wasps.

A

Onslaught FastCap cannot be applied any fogger, but it can be applied in a hand held pump sprayer or backpack sprayer. It is safe to apply on the St. Augustine and Bahiagrass. It can be applied under and around ornamentals and trees. It is labeled for spiders including wolf spiders as well as wasps.

How to Get Rid of Spiders

How to Get Rid of Wasps

Was this answer helpful to you?  Yes No

07/19/2016 Carl from West Palm Beach

QIs there a knockdown for Black Widow and Brown Recluse spiders that is pet friendly once dry?
We have a ton of black widow and brown recluse spiders on our porch and are trying to get rid of them, I have sprayed with other insecticides (Talstar P) and Suspend but I was wondering if there is any fast knockdown that I can use, we do have animals out there (dogs and cats) but they can be removed until it dries. The spiders are also located over our pool so I would imagine that some spray will get in there (What happens in that case, how long till the dogs can go in the pool)

A

A great contact and residual spray for spiders and other more aggressive pests is Onslaught FastCap Spider and Scorpion Insecticide. Onslaught FastCap has both a fast-acting knockdown and residual activity.†If you would like something that is all-natural, then I would suggest Essentria IC3 Insecticide, which does not have restrictions for use around bodies of water.

1 of 1 people found this answer helpful.
Was this answer helpful to you?  Yes No

06/24/2016 David from Buckeye, Az

QWould Onslaught FastCap Spider and Scorpion Insecticide be a good product for general purpose as well as spider control?
I live in Arizona. I have spiders, crickets, etc. in my home and garage. We are in a new build area so we are also concerned about scorpions. I'd like something I could spray every few months and not worry about it. Where should I spray for Spiders etc. that can go up the walls? Thanks.

A

Yes, Onslaught FastCap Spider and Scorpion †Insecticide would be a great product for general purpose pest as well as spider and scorpion control. It will give you a 90 day residual both indoor and outdoor as well.†

1 of 1 people found this answer helpful.
Was this answer helpful to you?  Yes No

06/02/2016 Rex from Dallas

QCan I use my Stihl fogger with Onslaught FastCap outside?

A

Due to the particle size of†Onslaught FastCap Spider and Scorpion††we do not recommend applying with a fogger. Depending on what you are treating for please see our Fogging solutions.††You could use Onslaught in a mist blower that does not produce a true fog.

Was this answer helpful to you?  Yes No

05/08/2016 Raul from Tx

QWill Onslaught FastCap Spider and Scorpion Insecticide kill dog ticks? If so, how many ounces per 25 gallon tank?

A

Onslaught FastCap Spider and Scorpion Insecticide†is labeled for dog ticks. You will mix 1 oz per gallon of water per 1,000 sq ft.

1 of 1 people found this answer helpful.
Was this answer helpful to you?  Yes No

See all 58 questions »


Purchase and Buy Onslaught FastCap Spider and Scorpion Insecticide for sale now
with the best online lowest price and free shipping!


We only sell professional do it yourself pest control (diy), exterminator and extermination
pesticide, chemical and bug killer treatment products to spray, exterminate and eliminate pests.

These products are not available in stores such as Home Depot, Lowes, Walmart or Ace Hardware.
We accept VISA, MasterCard, American Express, Discover and PayPal Payments.